Piston packing



C. L. COOK PISTON PACKING June 2 8, 1927.

2 Sheets-Sheet 1 Filed Jung 8, 1926 Marks-lee 620i abkoumq C. L. COOK PISTON PACKING Filed June s, 1926 2 Sheets-Sheet t Cfiarleolee Cook Ill Patented June 28, 1927.

UNITED STATES CHARLES Lian COOK, or LouIsviLnE, KENTUCKY.

PIs'ron PACKING.

Application filed time s,

,T-he present invention relates to packing )f thetype disclosed in my priorpatent, No. 1,546,625, of J uly 21, 1925, the object being to provide a structurethat can be varied so s e Pr per y can' be adj usted so as toafiord theproper amount of resistance under the different pressure conditions found to obtain.

In the accompanying drawings t Figure 1 isa viewin 'elevation of the piston packing, with portions thereof broken away, 7 V 1 I p Figure 2 is a cross sectional view showing h P ng pla t on ar sen e Figure 3 is a view similar to Figure 2, but taken at a different point, I

Figure 1 is a view in elevation of the innor side of one of the bul'lring sections,

Figure 5 is a detail perspective view of a ortion of a packing ring illustrating one of the holdmgelementsand the means for maintaining it in position.

Figure 6 is a detail perspective view of a portion of onejo'f the holding elements. I

Figure 7 a detail sectional perspective view of one of the bull ringsections showing a modified form of construction.

In the full embodiment disclosed, a piston body is shown at 8, andhas outstanding flanges 9 forming the usual annular groove or recessed seat 10.. y

In the groove 10 is located a bull or junk ring formed of sections 11 and 12. Said sections have outer inclined faces 13 and inwardly faced shoulders 14. One of the bull ring sections, as 11, is provided with a plurality ofsocketslS opening through its inner face and in these sockets are placed plugs 16 that project beyond the inner face of the ring section, as illustrated in Figure 1, and rest upon the bottom of the groove 10 as illustrated in Figure 3. The other section 12 is provided with laterally projecting pins 7 7 formed in the section 11. It willthus be evident that while the section 11 is primarily supported on the bottomof the groove 10, the section 12 is supported from and by the" section 11, but is allowed to move away from and toward the same, Inasmuch as these two rings have theiriinner diameters eccentric to their peripheral faces, and they are set diametrically opposite, this setting is maintained by the pins 17. The feet 16am provided for supporting the bull ring as a when, and they may be properly ease to fitted to i the piston and 17 slidably engaged in sockets 18 I 1926. Serial no. 1i4,5'as.

The ring sections are urged apartby'co'iled springs 19 interposed between them and fitted in sockets 20 formed in said rings, the

said sockets alternating with the pins, as illustrated in Figure 4., y Surrounding each bull ring section 11-;1'2 1s a packing ring 21 that is split as ill-ustratedat 22, and is provided with'th'e usual cover plate 23. These rings havejin'wardly extending flanges 24: provided with win inclined faces 25 that bear against the correspondingly inclined faces 13 of the li'iill ring sections. Thepackin'g rings 21 furthermore have outwardlyjfac'ed shoulders 26 that underlie the shoulders 14: of the bull rlng sections and are spaced therefrom. v Inte'rp'osed between the shoulders 14: and sen-e holding elements formed of material softer than the 'materialof the rings. These elementsas sl1own-in Figures ,1, 5a1'1d Ginay be short sections of wire. They are designated 27. They vlie in a ring between the shoulders with their adjacent spaced apart, each preferably having one end off- (set, as illustrated at 28, and engaged ina socket 29 formed in the packing ring. i The holding elements, for example, may of copper, and as they are interposed between and are borne against by the shoulders 14 and 26, obviously they assist in holding the packing rings against undue expansion, and therefore prevent the creation of excessive friction on the cylinder wall. At the same time as wear takes place between the packing rings 21 and the cylinder wall, the elemerits '27 being of soft material, will be come deformed both cross sectionally and longitudinally, thus allowing expansion on the part of the ringsto take up, wear,

Instead of these elements 27 extending longitudinally of the shoulders 14 2 6, as indicated in Figures 1 and 5, series of short pins or pegs 30 may be employed, as interned inFig'ui'e 7, these piss or pegs beingengaged injsocketsin formed in the packing rings and projecting so as too've'rlie the outwardly facing shoulder of said packing rings. p A With this c"iistruc'tion,'; as already explained, the bull ring 11-'12 is/iitted to the piston and yet the sections thereof are allowed to inoveaway froiii'and towards each other. Their, movement amines each other is c'ausedh the springs 19; and ass zienseqaeeaiheir outer inclined facet;

hearing against the faces 25 of the packing rings 21, serve to urge said packing rings diametrically outward. This movement, however, is resisted by the holding elements 27 or 30. As already explained, these elements are deformed when resistance to the outward movement is lessened by the wear. It will furthermore be clear that by altering the number of elements 27 or 30, this resistance can be varied and either increased to a maximum by employing a full number of the holding elements, or reduced by removing some of the same.

F romthe foregoing, it is thought that the construction, operation and many advan ages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

What I claim, is

1. A piston packing comprising a bull ring formed of separable sections, an expansible packing ring associated with each section, and a plurality of separately removable and insertible holding elements of material softer than the bull ring sections and packing rings and interposed between portions thereof, said holding elements being deformed by being compressed between sa'd portions of the sections and packing rings due to the expansion of the packing rings.

2. A piston packing comprising a bull ring formed of separable sections having outer inclined faces and holding shoulders, an expansible packing ring associated with each section and having inner inclined faces that bear against the outer inclined faces of the bull ring sections, said expansible packing rings having shoulders underlying the shoulders of the bull ring sections, and holding elements interposed between the shoulders and of softer material than the bull ring sections and packing rings, said holding elements being deformed by being compressed between said shoulders due to the expansion of the packing rings.

3.1%, piston packing comprising a bull ring, an expansible packing ring associated therewith, and holding means interposed between portions of the same, said means com prising a plurality of separate elements formed of material softer than the rings and deformed by being compressed between said portions thereof due to the expansion of the ring, said elements being separately removable and insertible to vary the amount of resistance afforded thereby.

4. A piston packing comprising a bull ring, an expansible packing ring associated thereto, and holding means interposed between portions of the same, said means comprising a plurality of separately mounted separately removable elements formed of material softer than the rings and deformed by being compressed between said portions thereof due to the expansion of the ring.

5. A piston packing comprising a bull ring having a shoulder, an expansible packing ring having a shoulder in opposition to the shoulder of the bull ring, aplurality of spaced elements interposed between the shoulders and of softer material than the rings, said elements being deformed by pressure between the shoulders on the expansion of the packing ring, and means for holdin the elements in spaced relation.

6. A piston packing comprising a bull ring having a shoulder, an expansible packing ring having a shoulder in opposition to the shoulder of the bull ring, one of said. rings having sockets adjacent the shoulder, and a plurality of spaced elements engaged in the sockets and interposed between the shoulders and of softer material than the rings, said elements being deformed by pressure between the shoulders on the expansion of the packing ring.

7. A piston packing comprising a bull ring of separable sections having outer inclined faces and inwardly facing shoulders, expansible packing rings having inclined inner faces that bear against the inclined faces of the bull ring sections, said packing rings having outwardly facing shoulders underlying the shoulders of the bull ring, and elements of softer material than the rings fixed to certain of the same and located between the shoulders, said elements being deformed by pressure between the shoulders.

8. The combination with a piston having a groove, of a bull ring member in the groove, comprising separable sections,spaced feet on one of the sections that rest on the bottom of the groove, means connecting the sections for supporting the other section by the footed section, while permitting their separation, and expansible packing rings carried by the bull ring sections.

9. The combination with a piston having a groove. of a bull ring member in the groove comprising separable sections, spaced feet on one of the sections that rest on the bottom of the groove, sliding pin connections between the sections for supportingthe other section by the footed section, while permitting their separation, and expansible packing rings carried by the bull ring sections.

10. The combination with a piston body having an annular groove, of a bull ring in the groove, comprising sections having inclined outer faces and inwardly facing shoulders, springs interposed between the sections, spaced feet on one section that rest on the bottom of the groove, dowels connecting the sections and supporting one by the other While permitting their movement away from each other, packing rings surrounding the bull ring sections and having inner inclined faces that slidably bear against the corresponding faces of the bull ring sections, said packing rings having outwardly faced shoulders underlying the shoulders of the bull ring sections, and holding elements interposed between the Opposed shoulders and of the packing rings expand.

In testimony whereof, I ailix my signature.

CHARLES LEE COOK. 

